Carhartt Women's Lightweight Cushioned Cotton Crew Sock - 3-Pack 27% nylon All season sock Natural cotton blend Is built into Carhartt socks with an antimicrobial that reduces the growth of odor causing bacteria to keep socks smelling fresh. Fiber bonding technology ensures the retention of bacteria fighting properties wash after wash. 71% Cotton, 27% Nylon, 2% Lycra Spandex